Process for making well-casing.



A. SMITH. PROCESS FOR MAKING WELL CASING.

APPLICATION FILED JUNE 2, 1911.

Patented May 28, 1912.

2 SHEETS-SHEET 1.

.WlT/VESSES HE. @l k ATTORNEY A. SMITH.

' PROCESS FOR MAKING WELL OAS ING.

APPLICATION FILED JUNE 2,1911.

1,027,91 7, Patented May 28, 1912.

2 SHEETS-SHEET 2.

mac Lw ATTORNEY UNITED STATES, PATENT orrion.

ANDREW SMITH, OF SAN" MATEO, CALIFORNIA, ASSIG-NOR T0 SMITH METAL PERFO-RA-TING COMPANY, OF SAN MATEO COUNTY, CALIFORNIA.

raocnss. FOR MAKING. WELL-CASING.

,Continuat'ion of application Serial No.

Specification of Letters Patent.

Patented May 28,1912.

489,642, filed April 13, 1909f This application filed: June 2, 1911.Serial No. 630,387.

. Taall whom it may coat/em Be it knownthat I, ANDREW SMITH, citizen ofthe United States, residing at San Mateo, in the county of San Mateo andState of California, have invented a new and useful Process forMakingWell-Casing,

of which the following is. a specification insuch full and clear termsas will enable those skilled in the artto construct and use the same.

This invention relates toaprocess of pro- .the object beingv to producea] narrow slot v the art that it is not possible by the ordimeanswhereby an indefinite number of slots.

sufficiently fine to exclude fine sand in metal pl ates of any desiredthickness.

Itwill be understood by those skilled in nary punching processes toproduce openings In a metal plate. of the harder metals with a p m'chwhose smallest dimension is less than the thickness of the plate to .be-

punched, such punches being unable to stand the repeated punchingoperations. I

This invention therefore seeks to provide narrower than the thickness ofthe metal sheet may be produced therein with punches which willwithstand the heaviest usage.

Another object of the invention is to produce a slotted metal sheetwhich will have the walls of, the slots comparatively smooth, therebyincreasing the life of the metal sheet" since with metal sheets havingfine 0 enings broken, therein in the production 0? the so-called crackedcasings, the

roughened edges of the openings begin to rust very quickly and in ashort time the opening is enlarged so much as to be practically uselessfor the purposes intended.

Another object of forming casing in the manner herein described lies inthe fact that the smooth walled slots produced in the casing are veryeasily galvanized and may be so galvanized after the casing has beenfinished without danger of stopping up the slots so formed.

In the drawings in which the same numeral of reference is applied to thesame portion throughout the several views, Figure 1 is a side elevationof a portion of well casing slotted in the manner hereindescribed, Fig.2 is a plan view thereof, Fig. 3 is a plan of a plate which has beenpunched to form projections on one side thereof, 4

is a side elevation of the plate shown in the Fig. 3, Fig.5 is asectional view of the plate shown in Fig. 3, Fig. 6 is a plan view of aplate which has been produced by forming projections on. opposite sidesthereof, the -metal adjacentthe slits formed being moved in oppositedirection something more than one-half the thickness of the plate,Fig.'7 1s a side elevation of the plate shown in Fig. 6, Fig. 8. is asectional View of the plate shown in Fig. 6, Fig. 9 is a plan view of aplate which has been formed by moving the metal on opposite sides of theseveral slits parallel to its initial position as would be the case witha straight and punch, save that the ends of the projection thus formedare rounded, Fig. 10 is a view of the plate shown in Fig. 9 in endelevation,-Fig; 11, is a View of the plate shown in Fig. 9 in side.elevation, -F ig 12 is a sectional view of the well casing in whichthere are a series of slots 2- formed, said slots extending around thecasing in several parallel series.

-In Fig. 3 a plate 8 has projections 4::

formed therein, said projections being pressed up from the body of themetal forming the plate slightly more than the total thickness of theplate, the total width of the metal distorted by the punch being greaterthan the thickness of the plate, whereby it is possible to use a verystrong and solid punch. This plate is shown in side elevation and insection in F igs, 4 and 5.

In Fig. 6 there is shown a plate having projections 6 formed therein onone side and projections 7 formed therein on the reverse side, theobject being to move the metaladjacent the slots as short a distance aspossible, thus stretching it the minimum plate shown in Fig." 9, Fig. 13is a plan while the latter are on the opposite side thereof. :This formof projection is produced by means of a straight end punch having itscorners curved to prevent cutting the metal at the end of the punch.

After the production of any one of the above mentioned plates, the punchforming the projections'therein may be struck laterally to upset theedges of each of the projections thus produced, as indicated at 11 a onthe plate 8. After the edges of the proj ections have been upset, theplates may then be passed through rolls which will again return theprojections to the plane of the plate, thus making a perfectly smoothplate save for the slight projections at the edges of the projectionswhere they have'been' up-,

set. Such a plate is shown in plan in Fig. 13 and in sectional view inFig. 14, the amount of the upsetting being exaggerated I in the latterfigure for the purpose of illustration.

It will of course be understood'that sinceit is contemplated that thisproduct shall exclude from the pipe all fine materials such as sand, theopenings produced must be very small. In the case of oil wells, theopenings are about one inch long by onesixteenth of an inch wide inthree-eighths to one-half inch casing, while in the case of water wellsthe openings are about" onethirty-second of an inch in width. or less,as may the condition of the soil in which the well is bored, while inthe case of drain tiling, the slots willbe from one-thirty-second of aninch downwardly depending upon the soil in which the tiling is placed.

It will be obviousthat the plate may be used with or without returningthe projections to the plane of the sheet, the only requisite being thatthe upsetting be of such an amount as is deemed necessary to, producethe desired slits in the finished plate.

- Having thus described my invention what I claim as new and desire tosecure by Letbe' determined necessary owing to .the sheet, as set forth.

in the presence of ters Patent of the-United States,,modificationswithinthe scope of the claims being expressly reserved, is asfollows: 1. The process of making plates for well casings comprisingforming a plurality of slits in a plate by a shearing operation andlaterally displacing the metal upon one side of each slit, thus causingthe edges to project beyond the plane of the plate, and then upsettingthe projecting edges. i I 2. The process of making plates for welcasings comprising forming a pluralityoi slits'in a plate by a shearingoperation an laterally displacing the metal upon one side of each slit,thus causing the edgesto project beyond the plane of the plate, thenupsetting the projecting edges, and pressing the laterally. displacedportions into the plane of the metal sheet.

3. In a process for the production of well casing, forming a series ofprojections in ametal plate by pressing adjacent portions thereof onopposite sides in opposite directions a distance slightly more thanone-half the thickness of the metal late, thus forming a slit'betweensaid portions, as set forth.

4.- In a process for the production of well casing,'forming a series ofprojections in a metal plate by ressing adjacent portions thereof onopposite sides in opposite directions a distance slightly more thanone-half the thickness of the metal plate thus forming a slot betweensaid portions, and upsetting the edges of the projections thus formed,as set forth.

5. In a process for production of well,

casing, forming 'a' series of-projections in a metal plate by pressingportions thereof on opposite sides in opposite directions a distanceslightly more than one'half the thickness of themetal plate,thus'forming a. slit between said portions, upsetting the edges thusformed, and then pressing the projections back into the general plane ofIn testimony whereof Ihave hereunto set p my hand this 23 day of May-A.D. 1911', the two subscribed witnesse's.

Witnesses:

O. P. GRIFFIN, HENRY B. LISTER.

NDREW sMrr .'v Y

